Interacting with Your Class During the Session Is Effective When

Interacting with your class during the session is effective when:

A) It doesn't work. They should be working too hard to be able to answer questions.
B) You single out a few individuals who some to class regularly; they are the most committed.
C) You use a few simple questions to the whole class to restore motivation and check on the level of effort.
D) You single out a few individuals who are new or don't come often; they'll appreciate being noticed.